a. Implement a function that shifts a given vector to the right by k. For example, for the vector [1, 2, 3, 4] the result for k=1 would be [4, 1, 2, 3] and for k=2 would be [3, 4, 1, 2] (every element shifts to the right k times, if the right boundary is reached the elements go to the left side of the vector). The function (or script) should take a vector and a value of k and return the shifted vector. In your solution, you may not apply the built-in function circshift that shifts arrays in MATLAB, but you can debug your code using that function.

b. You own a computer store that sells laptops of various brands. You are considering giving a 10% discount on the current prices. However, you are worried that if you give the discount you will lose in terms of revenue. You asked a forecasting firm to predict the next months sales (in quantity) with and without the discount. Using the data below, compute the revenues with and without discount, and decide if you will proceed with the discount. You must use vector and/or matrix operations in the solution.

The script should print the revenue before & after and print a Boolean true (1) or false (0) for whether you will give discount or not that will be computed for the specific input. You may solve for the specific example below. Here is the data you need for the analysis:

Prices: Brand	Price Before Discount
P&H	1000
CAM	1200
LLED	1100
Microhard	1400

Forecasted quantities:

Brand	Quantities before Discount	Quantities after Discount
P&H	50	51
CAM	100	105
LLED	120	122
Microhard	30	35